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But 'when the grid is up' isn't the time you'd want to feed power from one outlet into the others. It's when the grid is down you'd want to do this, no?

I guess you could flip the trip switch to isolate the circuit?

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Yes & no, there are two reasons to push power back: 1- to save money on energy, charge when cheap discharge when expensive. Pila can do this. 2- to backup. Pila can’t do this. It can only backup appliances plugged into it.

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